// Problem: 
// Contest: 
// URL: 
// Memory Limit: 
// Time Limit: 
// #pragma GCC optimize("Ofast")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#include<bits/stdc++.h>
using namespace std;
#define int long long
inline int read(){
	int s=0,w=1;
	char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')w=-1;ch=getchar();}
	while(ch>='0'&&ch<='9') s=s*10+ch-'0',ch=getchar();
	return s*w;
}
int ans=0;
void dfs(int t,int f)
{
	if(f==100)return ;
	if(t==30)
	{
		if(f==70)ans++;
		return ;
	}
	dfs(t+1,f+10);
	dfs(t+1,0);
}
signed main()
{
	int t=1;
//	cin>>t;
	while(t--)
	{
		dfs(0,0);
		cout<<ans;
	}
	return 0;
}
